Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 519 · 40 questions

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

1. 1.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) time for 10 swings (c) the same hook (d) the string length
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
5. 5.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
6. 6.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
7. 7.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
8. 8.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
9. 9.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a string (d) a magnet
12. 12.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
13. 13.True or false: a magnet is needed for the pendulum. (a) False (b) True
14. 14.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
15. 15.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
16. 16.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
17. 17.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a ruler (d) a string
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a pencil and tape (d) a battery cell
20. 20.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a sundial (d) a digital watch
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
24. 24.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a balloon (c) a mirror (d) yeast
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a stopwatch (d) turmeric powder
26. 26.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
28. 28.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
29. 29.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a string (c) a magnet (d) yeast
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) how far we pull it back
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) time for 10 swings (c) the string length (d) the same hook
33. 33.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
35. 35.True or false: a mirror is needed for the pendulum. (a) False (b) True
36. 36.True or false: a ruler is needed for the pendulum. (a) True (b) False
37. 37.True or false: a ruler is not needed for the pendulum. (a) True (b) False
38. 38.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a string (d) a ruler
39. 39.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
40. 40.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) turmeric powder (d) a magnet

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